gotosocial/internal/httpclient/sanitizer.go
Daenney 5e2bf0bdca
[chore] Improve copyright header handling (#1608)
* [chore] Remove years from all license headers

Years or year ranges aren't required in license headers. Many projects
have removed them in recent years and it avoids a bit of yearly toil.

In many cases our copyright claim was also a bit dodgy since we added
the 2021-2023 header to files created after 2021 but you can't claim
copyright into the past that way.

* [chore] Add license header check

This ensures a license header is always added to any new file. This
avoids maintainers/reviewers needing to remember to check for and ask
for it in case a contribution doesn't include it.

* [chore] Add missing license headers

* [chore] Further updates to license header

* Use the more common // indentend comment format
* Remove the hack we had for the linter now that we use the // format
* Add SPDX license identifier
2023-03-12 16:00:57 +01:00

67 lines
1.7 KiB
Go

// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package httpclient
import (
"net/netip"
"syscall"
"github.com/superseriousbusiness/gotosocial/internal/netutil"
)
type sanitizer struct {
allow []netip.Prefix
block []netip.Prefix
}
// Sanitize implements the required net.Dialer.Control function signature.
func (s *sanitizer) Sanitize(ntwrk, addr string, _ syscall.RawConn) error {
// Parse IP+port from addr
ipport, err := netip.ParseAddrPort(addr)
if err != nil {
return err
}
if !(ntwrk == "tcp4" || ntwrk == "tcp6") {
return ErrInvalidNetwork
}
// Seperate the IP
ip := ipport.Addr()
// Check if this is explicitly allowed
for i := 0; i < len(s.allow); i++ {
if s.allow[i].Contains(ip) {
return nil
}
}
// Now check if explicity blocked
for i := 0; i < len(s.block); i++ {
if s.block[i].Contains(ip) {
return ErrReservedAddr
}
}
// Validate this is a safe IP
if !netutil.ValidateIP(ip) {
return ErrReservedAddr
}
return nil
}